1 Packages
library(dplR) # dendrochronology
library(tidyr)
library(dplyr)##
## Attaching package: 'dplyr'## The following objects are masked from 'package:stats':
##
## filter, lag## The following objects are masked from 'package:base':
##
## intersect, setdiff, setequal, unionlibrary(ggplot2)
library(corrplot)## corrplot 0.84 loadedlibrary(stringr)2 Read in Data
Locations of Chronologies
2.1 Cook - Longfellow Trail - PIST - ITRDB PA008
NOAA Study Page: https://www.ncdc.noaa.gov/paleo-search/study/2993
Chronology file name : PA008.CRN Measurement file name : PA008.RWL
Date checked : 02DEC94 Technician’s name : MARIETTE SEKLECKI Supervisor’s name : HENRI D. GRISSINO-MAYER Beginning year : 1679 Ending year : 1981 Principal investigators: ED COOK Site name : LONGFELLOW TRAIL Site location : PENNSYLVANIA, USA Species information : PIST WHITE PINE Latitude : 4120N Longitude : 7912W Elevation : N/A M Series intercorrelation: 0.658 Avg mean sensitivity : 0.211 Avg standard deviation : 0.591 Avg autocorrelation : 0.856 Number dated series : 24 Segment length tested : 50 Number problem segments: 0 Pct problem segments : 0.00
Are there obvious misdated series? NO Number possible misdated series : N/A Percent misdated series : 0.00
Comments: NO ELEVATION GIVEN EXELLENT HIGH QUALITY CHRONOLOGY
pa008.crn <- read.crn("data/pa008.crn")## There appears to be a header in the crn file
## There is 1 seriescrn.plot(pa008.crn, add.spline = TRUE, nyrs=30)
pa008.rwl <- read.rwl("data/pa008.rwl")## Attempting to automatically detect format.
## Assuming a Tucson format file.
## There does not appear to be a header in the rwl file
## There are 24 series
## 1 058021 1679 1981 0.01
## 2 058022 1721 1981 0.01
## 3 058031 1702 1939 0.01
## 4 058032 1689 1939 0.01
## 5 058051 1720 1956 0.01
## 6 058052 1693 1940 0.01
## 7 058061 1685 1967 0.01
## 8 058062 1687 1968 0.01
## 9 058071 1700 1970 0.01
## 10 058072 1691 1970 0.01
## 11 058081 1706 1970 0.01
## 12 058082 1693 1967 0.01
## 13 058101 1693 1970 0.01
## 14 058102 1698 1970 0.01
## 15 058121 1696 1981 0.01
## 16 058122 1711 1981 0.01
## 17 058141 1712 1981 0.01
## 18 058142 1699 1981 0.01
## 19 058151 1705 1970 0.01
## 20 058152 1692 1981 0.01
## 21 058191 1685 1968 0.01
## 22 058201 1730 1940 0.01
## 23 058202 1684 1981 0.01
## 24 058211 1749 1979 0.01rwl.report(pa008.rwl)## Number of dated series: 24
## Number of measurements: 6435
## Avg series length: 268.125
## Range: 303
## Span: 1679 - 1981
## Mean (Std dev) series intercorrelation: 0.6192482 (0.0761018)
## Mean (Std dev) AR1: 0.8445 (0.07192569)
## -------------
## Years with absent rings listed by series
## Series 058061 -- 1934
## 1 absent rings (0.016%)
## -------------
## Years with internal NA values listed by series
## Noneseg.plot(pa008.rwl)
2.2 Guyette - Dividing Lake - PIST - ITRDB CANA127
NOAA Study Page: https://www.ncdc.noaa.gov/paleo-search/study/3448
Chronology file name : CANA127.CRN Measurement file name : CANA127.RWL Date checked : 17JUL96 Technician’s name : MARIETTE SEKLECKI Supervisor’s name : HENRI D. GRISSINO-MAYER Beginning year : 1662 Ending year : 1994 Principal investigators: R.P. GUYETTE Site name : DIVIDING LAKE Site location : ONTARIO, CANADA Species information : PIST EASTERN WHITE PINE Latitude : 4525N Longitude : 7836W Elevation : 500 M Series intercorrelation: 0.572 Avg mean sensitivity : 0.209 Avg standard deviation : 0.648 Avg autocorrelation : 0.828 Number dated series : 47 Segment length tested : 50 Number problem segments: 34 Pct problem segments : 8.15
Are there obvious misdated series? YES Number possible misdated series : 3 Percent misdated series : 6.38 Do they affect chronology quality? N/A Recommend withhold from ITRDB? N/A
Comments: #4 DLW04B, #5 DLW05B, #40 DLW19A ARE MISDATED #8 DLW09A 1736-1849, #32 LDW09B 1741-1824 HAVE LOW CORRELATIONS DATA SET COULD BE IMPROVED
cana127.crn <- read.crn("data/cana127.crn")## There appears to be a header in the crn file
## There is 1 seriescrn.plot(cana127.crn, add.spline = TRUE, nyrs=30)
cana127.rwl <- read.rwl("data/cana127.rwl")## Attempting to automatically detect format.
## Assuming a Tucson format file.
## There appears to be a header in the rwl file
## There are 47 series
## 1 dlw01a 1764 1994 0.01
## 2 dlw02a 1716 1994 0.01
## 3 dlw03a 1762 1994 0.01
## 4 DLW04B 1688 1994 0.01
## 5 dlw05b 1771 1994 0.01
## 6 dlw07a 1889 1994 0.01
## 7 dlw08a 1788 1994 0.01
## 8 DLW09A 1736 1994 0.01
## 9 dlw10a 1798 1994 0.01
## 10 dlw11a 1741 1994 0.01
## 11 dlw12a 1704 1994 0.01
## 12 dlw13a 1743 1994 0.01
## 13 dlw14a 1662 1994 0.01
## 14 dlw16a 1676 1991 0.01
## 15 dlw15a 1830 1994 0.01
## 16 dlw17a 1730 1992 0.01
## 17 dlw18b 1777 1994 0.01
## 18 dlw19b 1862 1994 0.01
## 19 dlw20b 1805 1994 0.01
## 20 dlw23b 1762 1994 0.01
## 21 dlw24b 1775 1994 0.01
## 22 dlw25b 1777 1994 0.01
## 23 dlw26b 1790 1994 0.01
## 24 dlw27b 1757 1994 0.01
## 25 dlw029 1800 1994 0.01
## 26 dlw01b 1770 1994 0.01
## 27 dlw03b 1762 1994 0.01
## 28 dlw05a 1773 1994 0.01
## 29 dlw06a 1757 1994 0.01
## 30 dlw07b 1880 1994 0.01
## 31 dlw08b 1766 1994 0.01
## 32 dlw09b 1741 1994 0.01
## 33 dlw11c 1687 1994 0.01
## 34 dlw12b 1665 1992 0.01
## 35 dlw14b 1669 1994 0.01
## 36 dlw15b 1860 1994 0.01
## 37 dlw16b 1693 1994 0.01
## 38 dlw17b 1692 1992 0.01
## 39 dlw18a 1765 1940 0.01
## 40 dlw19a 1784 1994 0.01
## 41 DLW20A 1763 1994 0.01
## 42 dlw22a 1830 1994 0.01
## 43 dlw24a 1850 1994 0.01
## 44 DLW25A 1764 1994 0.01
## 45 dlw26a 1707 1994 0.01
## 46 dlw27a 1752 1994 0.01
## 47 dlw28a 1830 1994 0.01rwl.report(cana127.rwl)## Number of dated series: 47
## Number of measurements: 10839
## Avg series length: 230.617
## Range: 333
## Span: 1662 - 1994
## Mean (Std dev) series intercorrelation: 0.5399936 (0.1049041)
## Mean (Std dev) AR1: 0.815617 (0.1225253)
## -------------
## Years with absent rings listed by series
## None
## -------------
## Years with internal NA values listed by series
## Noneseg.plot(cana127.rwl)
2.3 Guyette - Dividing Lake Aquatic - PIST - ITRDB CANA148
NOAA Study Page: https://www.ncdc.noaa.gov/paleo-search/study/3449
Chronology file name : CANA148.CRN Measurement file name : CANA148.RWL Date checked : 14MAR05 Checked by : H. ADAMS AND J. LUKAS Beginning year : 950 Ending year : 1993 Principal investigators: R.P. GUYETTE, B. COLE
Site name : DIVIDING LAKE AQUATIC Site location : CANADA
Species information : PIST EASTERN WHITE PINE Latitude : 4524 Longitude : -07836 Elevation : 400M
Series intercorrelation: 0.561 Avg mean sensitivity : 0.182 Avg standard deviation : 0.589 Avg autocorrelation : 0.862 Number dated series : 50 Segment length tested : 50
Number problem segments: 29 Pct problem segments : 8.22
cana148.crn <- read.crn("data/cana148.crn")## There appears to be a header in the crn file
## There is 1 seriescrn.plot(cana148.crn, add.spline = TRUE, nyrs=30)
cana148.rwl <- read.rwl("data/cana148.rwl")## Attempting to automatically detect format.
## Assuming a Tucson format file.
## There appears to be a header in the rwl file
## There are 50 series
## 1 DLA015 1648 1908 0.01
## 2 DLA025 1658 1974 0.01
## 3 DLA014 1675 1944 0.01
## 4 DLA020 1675 1947 0.01
## 5 DLA024 1843 1945 0.01
## 6 DLA011 1680 1920 0.01
## 7 DLA007 1551 1668 0.01
## 8 DLA013 1665 1874 0.01
## 9 DLA023 1699 1906 0.01
## 10 DLA008 1737 1915 0.01
## 11 DLA018 1665 1873 0.01
## 12 DLA012 1707 1823 0.01
## 13 DLA005 1835 1992 0.01
## 14 DLA03 1793 1983 0.01
## 15 DLA022 1709 1912 0.01
## 16 dla100 1531 1756 0.01
## 17 DLA097 1719 1967 0.01
## 18 DLA069 1568 1692 0.01
## 19 DLA109 1555 1668 0.01
## 20 DLA067 1637 1782 0.01
## 21 DL122B 1555 1780 0.01
## 22 DLA087 1684 1800 0.01
## 23 DLA044 1552 1709 0.01
## 24 DLA098 1776 1917 0.01
## 25 DLA060 1398 1574 0.01
## 26 DLA041 1625 1895 0.01
## 27 DLA047 1687 1804 0.01
## 28 DLA111 1552 1688 0.01
## 29 DLA104 1477 1725 0.01
## 30 DLA107 1675 1876 0.01
## 31 DLA051 1884 1993 0.01
## 32 DLA066 950 1152 0.01
## 33 DLA126 1650 1822 0.01
## 34 DLA101 1662 1869 0.01
## 35 DLA064 1320 1436 0.01
## 36 DLA105 1665 1810 0.01
## 37 DLA075 1705 1938 0.01
## 38 DLA128 1800 1954 0.01
## 39 DLA068 1042 1319 0.01
## 40 DLA123 1750 1948 0.01
## 41 DLA130 1605 1831 0.01
## 42 DLA057 1507 1701 0.01
## 43 DLA052 1754 1944 0.01
## 44 DLA050 1636 1803 0.01
## 45 DLA056 1568 1734 0.01
## 46 DLA131 1730 1841 0.01
## 47 DLA63 1392 1493 0.01
## 48 DLA122 1517 1650 0.01
## 49 DLA65B 1322 1442 0.01
## 50 DLA088 1388 1550 0.01rwl.report(cana148.rwl)## Number of dated series: 50
## Number of measurements: 9119
## Avg series length: 182.38
## Range: 1044
## Span: 950 - 1993
## Mean (Std dev) series intercorrelation: 0.4970208 (0.1131863)
## Mean (Std dev) AR1: 0.84128 (0.09196873)
## -------------
## Years with absent rings listed by series
## None
## -------------
## Years with internal NA values listed by series
## Noneseg.plot(cana148.rwl)
2.4 Wyse - Platte Plains - PIST - ITRDB MI015
NOAA Study Page: https://www.ncdc.noaa.gov/paleo/study/5358
Platte Plains, Michigan Pinus strobus - MI015 Additional Site Information Thomas C. Wyse, P. Charles Goebel
Purpose of Collection:
Forest disturbance history and recruitment patterns.
Cores are stored at: Forest Ecosystem Restoration & Ecology School of Natural Resources OARDC The Ohio State University 1680 Madison Avenue Wooster, OH 44691-4096
Description: The site is a sandy lake plain adjacent to Lake Michigan in northwest lower Michigan.
These cores were used with others to investigate forest disturbance history and recruitment patterns.
All ring width measurements were done with WinDENDRO. Cores were visually cross dated, and the cross dating was verified with COFECHA.
mi015.rwl <- read.rwl("data/mi015.rwl")## Attempting to automatically detect format.
## Assuming a Tucson format file.
## There appears to be a header in the rwl file
## There are 21 series
## 1 36-1 1920 2002 0.01
## 2 13-3 1912 2002 0.01
## 3 19-3 1937 2002 0.01
## 4 28-1 1933 2002 0.01
## 5 5-1 1937 2002 0.01
## 6 10-4 1928 2002 0.01
## 7 26-3 1929 2002 0.01
## 8 12-4 1962 2002 0.01
## 9 1-4 1950 2002 0.01
## 10 2-1 1936 2002 0.01
## 11 32-3 1916 2002 0.01
## 12 12-1 1958 2002 0.01
## 13 34-2 1943 2002 0.01
## 14 6-4 1987 2002 0.01
## 15 33-1 1917 2002 0.01
## 16 9-2 1916 2002 0.01
## 17 7-2 1973 2002 0.01
## 18 14-4 1973 2002 0.01
## 19 28-3 1922 2002 0.01
## 20 6-2 1928 2002 0.01
## 21 8-1 1984 2002 0.01rwl.report(mi015.rwl)## Number of dated series: 21
## Number of measurements: 1302
## Avg series length: 62
## Range: 91
## Span: 1912 - 2002
## Mean (Std dev) series intercorrelation: 0.4915569 (0.1124546)
## Mean (Std dev) AR1: 0.7149524 (0.1194401)
## -------------
## Years with absent rings listed by series
## Series 19-3 -- 2002
## 1 absent rings (0.077%)
## -------------
## Years with internal NA values listed by series
## Noneseg.plot(mi015.rwl)
3 Create Master Chronology
3.1 Join Chronologies
Series summary:
- pa008: 24 series; format 058xxx
- cana127: 47 series; format dlw 00x
- cana148: 50 series; format DLA 00x
- mi015: 21 series; format 00-0
master.rwl <- combine.rwl(list(pa008.rwl, cana127.rwl,cana148.rwl, mi015.rwl))
rwl.report(master.rwl)## Number of dated series: 142
## Number of measurements: 27695
## Avg series length: 195.0352
## Range: 1053
## Span: 950 - 2002
## Mean (Std dev) series intercorrelation: 0.4408118 (0.1237108)
## Mean (Std dev) AR1: 0.8146479 (0.1121976)
## -------------
## Years with absent rings listed by series
## Series 058061 -- 1934
## Series 19-3 -- 2002
## 2 absent rings (0.007%)
## -------------
## Years with internal NA values listed by series
## None3.2 Initial Removal of Series
Remove chronologies known to be misdated, problematic, or are much older than the rest of the series
4 DLW04B, #5 DLW05B, #40 DLW19A ARE MISDATED 8 DLW09A 1736-1849, #32 LDW09B 1741-1824 HAVE LOW CORRELATIONS
master.stats <- rwl.stats(master.rwl) #calculate statistics
old <- filter(master.stats, first < 1600) #filter for start date
old$series #generates list of old series to remove## [1] DLA007 dla100 DLA069 DLA109 DL122B DLA044 DLA060 DLA111 DLA104 DLA066
## [11] DLA064 DLA068 DLA057 DLA056 DLA63 DLA122 DLA65B DLA088
## 142 Levels: 058021 058022 058031 058032 058051 058052 058061 ... dlw28amaster.rwl <- master.rwl %>% select(-DLW04B, -dlw05b, -dlw19a, #misdated
-DLW09A, -dlw09b, #low correlations
-DLA060, -DLA066, -DLA068, -DLA064, -DLA65B, -DLA63, -DLA088,
-DLA007, -dla100, -DLA069, -DLA109, -DL122B, -DLA044, -DLA111,
-DLA104, -DLA057, -DLA056, -DLA122 #start before 1600
)3.2.1 Write RWL to file
write.rwl(master.rwl, "outputs/master_all.rwl", format = "tucson")## Warning in fix.names(col.names, name.width, mapping.fname, mapping.append):
## characters outside a-z, A-Z, 0-9 present: renaming series## [1] "outputs/master_all.rwl"3.3 Plot Series & Correlate
Series summary:
- pa008: 24 series (20%); format 058xxx
- cana127: 47-5 = 42 series (35%); format dlw 00x
- cana148: 50-18 = 32 series (27%); format DLA 00x
- mi015: 21 series (18%); format 00-0
rwl.report(master.rwl)## Number of dated series: 119
## Number of measurements: 23430
## Avg series length: 196.8908
## Range: 398
## Span: 1605 - 2002
## Mean (Std dev) series intercorrelation: 0.4439349 (0.1245525)
## Mean (Std dev) AR1: 0.8091849 (0.1173493)
## -------------
## Years with absent rings listed by series
## Series 058061 -- 1934
## Series 19-3 -- 2002
## 2 absent rings (0.009%)
## -------------
## Years with internal NA values listed by series
## Noneseg.plot(master.rwl, xlim=c(1600,2010))
master.stats <- rwl.stats(master.rwl)corr.master <- corr.rwl.seg(master.rwl, xlim=c(1600,2010))
flags <- as.data.frame(corr.master$flags)
head(flags)## corr.master$flags
## 058022 1875.1924
## 058032 1775.1824
## 058051 1900.1949
## 058061 1850.1899
## 058062 1850.1899
## 058082 1850.1899overall <- corr.master$overall
head(overall)## rho p-val
## 058021 0.3514356 3.250403e-10
## 058022 0.4109475 1.504866e-11
## 058031 0.4939740 0.000000e+00
## 058032 0.4381695 1.654348e-13
## 058051 0.4310429 3.075955e-12
## 058052 0.5100904 0.000000e+00avg.seg.rho <- as.data.frame(corr.master$avg.seg.rho)
tail(avg.seg.rho)## corr.master$avg.seg.rho
## 1825.1874 0.5549633
## 1850.1899 0.4453117
## 1875.1924 0.4736762
## 1900.1949 0.4743822
## 1925.1974 0.3928621
## 1950.1999 0.2744713There is (at least) one other way of looking at the average interseries correlation of a data set. The interseries.cor function in dplR gives a measure of average interseries correlation that is different from the rbar measurements from rwi.stats. In this function, correlations are calculated serially between each tree-ring series and a master chronology built from all the other series in the rwl object (leave-one-out principle).
master.cor <- interseries.cor(master.rwl)## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with tieshead(master.cor)## res.cor p.val
## 058021 0.3514356 3.250403e-10
## 058022 0.4109475 1.504866e-11
## 058031 0.4939740 0.000000e+00
## 058032 0.4381695 1.654348e-13
## 058051 0.4310429 3.075955e-12
## 058052 0.5100904 0.000000e+003.4 Adjust Sample Size
Right now, there are a disproportionate number of samples from the cana sites, despite the three sites all being approximatly equal distance from the Pinery. I’m going to remove the samples that correlate the weakest with the rest of the chronology so that it is more representative and not bias by one location. I’ll do this iteratively, by removing series based on a cutoff in groups and then re-computing the correlations.
Series summary:
- pa008: 24 series (20%); format 058xxx
- cana127: 47-5 = 42 series (35%); format dlw 00x
- cana148: 50-18 = 32 series (27%); format DLA 00x
- mi015: 21 series (18%); format 00-0
3.4.1 Remove Flags
Remove flags, only from cana sites for now because of the disproportionate number of samples
flags <- tibble::rownames_to_column(flags, "sample") #add years from row names
str(flags)## 'data.frame': 27 obs. of 2 variables:
## $ sample : chr "058022" "058032" "058051" "058061" ...
## $ corr.master$flags: Factor w/ 14 levels "1700.1749","1750.1799",..: 9 6 10 8 8 8 12 4 12 10 ...flags.cana <- flags %>% filter(str_detect(sample, fixed('dl', ignore_case=TRUE)))
flags.cana$sample## [1] "dlw02a" "dlw12a" "dlw17a" "dlw24b" "dlw12b" "dlw24a" "DLA020" "DLA008"
## [9] "DLA105"Remove from RWL file
#Remove flags
master.rwl <- master.rwl %>% select(-dlw02a, -dlw12a, -dlw17a, -dlw24b, -dlw12b, -dlw24a, -DLA020, -DLA008, -DLA105)
#Re-compute correlation
master.cor <- interseries.cor(master.rwl)## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties3.4.2 Remove by Correlation
master.cor <- tibble::rownames_to_column(master.cor, "sample") #add years from row names
#Correlations for each site
master.cor.pa008 <- master.cor %>% filter(str_detect(sample, '^058'))
master.cor.cana127 <- master.cor %>% filter(str_detect(sample, fixed('dlw', ignore_case=TRUE)))
master.cor.cana148 <- master.cor %>% filter(str_detect(sample, fixed('dla', ignore_case=TRUE)))
master.cor.mi015 <- master.cor %>% filter(str_detect(sample, '-'))
#Correlations for both Cana sites
master.cor.cana <- master.cor %>% filter(str_detect(sample, fixed('dl', ignore_case=TRUE)))
master.cor.cana %>% arrange(res.cor)## sample res.cor p.val
## 1 DLA024 0.2568955 5.219461e-03
## 2 dlw10a 0.3518071 3.829818e-07
## 3 dlw28a 0.3605749 1.332793e-06
## 4 DLA128 0.3606778 2.706800e-06
## 5 DLA098 0.3648655 6.718499e-06
## 6 dlw14a 0.3782481 1.386151e-12
## 7 DLA03 0.4080823 2.542894e-09
## 8 DLA075 0.4167618 8.511832e-11
## 9 dlw14b 0.4240592 6.433539e-16
## 10 DLA005 0.4254169 1.395845e-08
## 11 DLA014 0.4378191 8.356880e-14
## 12 dlw26a 0.4492272 0.000000e+00
## 13 DLA025 0.4495683 0.000000e+00
## 14 DLA131 0.4586181 2.074375e-07
## 15 dlw029 0.4682962 2.877052e-12
## 16 DLA012 0.4784070 4.135438e-08
## 17 dlw01b 0.4786063 0.000000e+00
## 18 dlw16a 0.4789021 0.000000e+00
## 19 DLA011 0.4801881 0.000000e+00
## 20 dlw22a 0.4854468 3.150749e-11
## 21 DLA107 0.4892444 0.000000e+00
## 22 DLA018 0.4900316 0.000000e+00
## 23 DLA013 0.4906000 0.000000e+00
## 24 dlw01a 0.4919291 0.000000e+00
## 25 DLW25A 0.4935558 0.000000e+00
## 26 dlw18b 0.5069303 0.000000e+00
## 27 DLA050 0.5129378 0.000000e+00
## 28 DLA022 0.5146810 0.000000e+00
## 29 dlw19b 0.5148882 2.177016e-10
## 30 dlw18a 0.5152435 0.000000e+00
## 31 dlw15a 0.5166273 7.134241e-13
## 32 dlw17b 0.5172328 0.000000e+00
## 33 DLA067 0.5184551 5.617419e-12
## 34 dlw07a 0.5188136 7.152354e-09
## 35 DLA130 0.5205056 0.000000e+00
## 36 DLA023 0.5205723 0.000000e+00
## 37 dlw15b 0.5211638 6.857381e-11
## 38 dlw03b 0.5222324 6.195625e-18
## 39 dlw07b 0.5237383 2.543440e-09
## 40 DLA047 0.5269973 7.986906e-10
## 41 dlw13a 0.5341388 0.000000e+00
## 42 DLA051 0.5396964 6.990243e-10
## 43 DLA015 0.5429470 0.000000e+00
## 44 DLA123 0.5443831 0.000000e+00
## 45 DLA041 0.5478259 0.000000e+00
## 46 dlw03a 0.5484566 0.000000e+00
## 47 dlw16b 0.5505385 0.000000e+00
## 48 DLA101 0.5513817 0.000000e+00
## 49 dlw23b 0.5549251 0.000000e+00
## 50 dlw11c 0.5560829 0.000000e+00
## 51 dlw27a 0.5640770 0.000000e+00
## 52 dlw08a 0.5657135 0.000000e+00
## 53 DLW20A 0.5691734 0.000000e+00
## 54 DLA126 0.5692780 0.000000e+00
## 55 DLA052 0.5804622 0.000000e+00
## 56 dlw11a 0.5894172 0.000000e+00
## 57 dlw27b 0.5972429 0.000000e+00
## 58 dlw08b 0.5989879 0.000000e+00
## 59 dlw25b 0.6036693 0.000000e+00
## 60 dlw26b 0.6057657 0.000000e+00
## 61 dlw06a 0.6081993 0.000000e+00
## 62 dlw20b 0.6235699 0.000000e+00
## 63 DLA087 0.6309674 0.000000e+00
## 64 dlw05a 0.6355094 0.000000e+00
## 65 DLA097 0.6455966 0.000000e+00#Filter based on correlation
master.cor.cana.low <- master.cor.cana %>% filter(res.cor < 0.51) #cutoff correlation of 0.51
master.cor.cana.low$sample## [1] "dlw01a" "dlw10a" "dlw14a" "dlw16a" "dlw18b" "dlw029" "dlw01b"
## [8] "dlw14b" "dlw22a" "DLW25A" "dlw26a" "dlw28a" "DLA025" "DLA014"
## [15] "DLA024" "DLA011" "DLA013" "DLA018" "DLA012" "DLA005" "DLA03"
## [22] "DLA098" "DLA107" "DLA075" "DLA128" "DLA131"Remove from RWL file
#Remove low correlations
master.rwl <- master.rwl %>% select(-dlw01a, -dlw10a, -dlw14a, -dlw16a, -dlw18b, -dlw029,
-dlw01b, -dlw14b, -dlw22a, -DLW25A, -dlw26a, -dlw28a,
-DLA025, -DLA014, -DLA024, -DLA011, -DLA013, -DLA018,
-DLA012, -DLA005, -DLA03, -DLA098, -DLA107, -DLA075,
-DLA128, -DLA131)
#Re-compute correlations
master.cor <- interseries.cor(master.rwl)## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties3.4.3 Repeat Removal by Correlation
Series summary:
- pa008: 24 series; format 058xxx
- cana127: 24 series; format dlw 00x
- cana148: 15 series; format DLA 00x
- mi015: 21 series; format 00-0
master.cor <- tibble::rownames_to_column(master.cor, "sample") #add years from row names
#Correlations for each site
master.cor.cana127 <- master.cor %>% filter(str_detect(sample, fixed('dlw', ignore_case=TRUE)))
master.cor.cana148## sample res.cor p.val
## 1 DLA015 0.5429470 0.000000e+00
## 2 DLA025 0.4495683 0.000000e+00
## 3 DLA014 0.4378191 8.356880e-14
## 4 DLA024 0.2568955 5.219461e-03
## 5 DLA011 0.4801881 0.000000e+00
## 6 DLA013 0.4906000 0.000000e+00
## 7 DLA023 0.5205723 0.000000e+00
## 8 DLA018 0.4900316 0.000000e+00
## 9 DLA012 0.4784070 4.135438e-08
## 10 DLA005 0.4254169 1.395845e-08
## 11 DLA03 0.4080823 2.542894e-09
## 12 DLA022 0.5146810 0.000000e+00
## 13 DLA097 0.6455966 0.000000e+00
## 14 DLA067 0.5184551 5.617419e-12
## 15 DLA087 0.6309674 0.000000e+00
## 16 DLA098 0.3648655 6.718499e-06
## 17 DLA041 0.5478259 0.000000e+00
## 18 DLA047 0.5269973 7.986906e-10
## 19 DLA107 0.4892444 0.000000e+00
## 20 DLA051 0.5396964 6.990243e-10
## 21 DLA126 0.5692780 0.000000e+00
## 22 DLA101 0.5513817 0.000000e+00
## 23 DLA075 0.4167618 8.511832e-11
## 24 DLA128 0.3606778 2.706800e-06
## 25 DLA123 0.5443831 0.000000e+00
## 26 DLA130 0.5205056 0.000000e+00
## 27 DLA052 0.5804622 0.000000e+00
## 28 DLA050 0.5129378 0.000000e+00
## 29 DLA131 0.4586181 2.074375e-07master.cor.cana148 <- master.cor %>% filter(str_detect(sample, fixed('dla', ignore_case=TRUE)))
#Correlations for both Cana sites
master.cor.cana <- master.cor %>% filter(str_detect(sample, fixed('dl', ignore_case=TRUE)))
master.cor.cana %>% arrange(res.cor)## sample res.cor p.val
## 1 DLA022 0.4488990 2.019798e-11
## 2 dlw03b 0.4618952 5.800152e-14
## 3 dlw07b 0.4643370 1.750415e-07
## 4 dlw17b 0.4648089 0.000000e+00
## 5 dlw15a 0.4662471 1.567261e-10
## 6 DLA023 0.4663880 7.738514e-13
## 7 DLA050 0.4703203 1.346069e-10
## 8 dlw15b 0.4767652 5.041995e-09
## 9 dlw18a 0.4791546 1.482691e-11
## 10 dlw16b 0.4798712 0.000000e+00
## 11 dlw13a 0.4840109 0.000000e+00
## 12 dlw19b 0.4883468 2.564729e-09
## 13 DLA047 0.4913606 1.435773e-08
## 14 dlw03a 0.4923310 0.000000e+00
## 15 DLA101 0.4932673 0.000000e+00
## 16 DLA130 0.5005158 0.000000e+00
## 17 dlw11c 0.5115456 0.000000e+00
## 18 DLA123 0.5123951 0.000000e+00
## 19 DLA067 0.5141387 1.660480e-11
## 20 DLA015 0.5188559 0.000000e+00
## 21 DLA051 0.5204812 3.294156e-09
## 22 dlw07a 0.5208196 6.151237e-09
## 23 dlw27a 0.5211824 0.000000e+00
## 24 DLA041 0.5281951 0.000000e+00
## 25 DLW20A 0.5295994 0.000000e+00
## 26 dlw08a 0.5327771 0.000000e+00
## 27 dlw11a 0.5332317 0.000000e+00
## 28 DLA126 0.5335612 0.000000e+00
## 29 dlw23b 0.5413676 0.000000e+00
## 30 dlw27b 0.5491772 0.000000e+00
## 31 dlw26b 0.5557607 0.000000e+00
## 32 DLA052 0.5664747 0.000000e+00
## 33 dlw25b 0.5665841 0.000000e+00
## 34 dlw06a 0.5672082 0.000000e+00
## 35 dlw05a 0.5674017 0.000000e+00
## 36 dlw08b 0.5687433 0.000000e+00
## 37 DLA097 0.5728154 0.000000e+00
## 38 dlw20b 0.5806139 0.000000e+00
## 39 DLA087 0.5830704 0.000000e+00#Filter based on correlation
master.cor.cana.low <- master.cor.cana %>% filter(res.cor < 0.50) #cutoff correlation of 0.50
master.cor.cana.low$sample## [1] "dlw03a" "dlw13a" "dlw15a" "dlw19b" "dlw03b" "dlw07b" "dlw15b"
## [8] "dlw16b" "dlw17b" "dlw18a" "DLA023" "DLA022" "DLA047" "DLA101"
## [15] "DLA050"Remove from RWL file
#Remove low correlations
master.rwl <- master.rwl %>% select(-dlw03a, dlw13a, -dlw15a, -dlw19b, -dlw03b,
-dlw07b, -dlw15b, -dlw16b, -dlw17b, -dlw18a,
-DLA023, -DLA022, -DLA047, -DLA101, -DLA050)
#Re-compute correlations
master.cor <- interseries.cor(master.rwl)## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties3.5 Refine Master Chronology (Correlation & Flags)
3.5.1 First Iteration
Series summary:
- pa008: 24 series (34%); format 058xxx
- cana127: 15 series (21%); format dlw 00x
- cana148: 10 series (14%); format DLA 00x
- mi015: 21 series (30%); format 00-0
Now that the three locations all comprise ~33% of the samples in the master chronology, I’m going to look for any samples with low correlations or that flag to remove.
master.cor <- tibble::rownames_to_column(master.cor, "sample") #add years from row names
master.cor %>% arrange(res.cor)## sample res.cor p.val
## 1 33-1 0.2435760 1.290095e-02
## 2 058211 0.2489064 1.453309e-04
## 3 1-4 0.2548450 3.423378e-02
## 4 10-4 0.2586449 1.317238e-02
## 5 13-3 0.2603466 7.255618e-03
## 6 28-3 0.2700097 8.176187e-03
## 7 6-2 0.2746686 9.069438e-03
## 8 5-1 0.2934003 9.000939e-03
## 9 34-2 0.2935495 1.283978e-02
## 10 12-1 0.2945840 2.612242e-02
## 11 6-4 0.3142857 1.367468e-01
## 12 19-3 0.3332022 3.341767e-03
## 13 7-2 0.3393541 3.890638e-02
## 14 14-4 0.3418719 3.503401e-02
## 15 058122 0.3445983 8.769858e-09
## 16 28-1 0.3476434 1.796192e-03
## 17 36-1 0.3567332 5.370362e-04
## 18 32-3 0.3876692 1.259478e-04
## 19 2-1 0.3942308 6.279258e-04
## 20 9-2 0.3962869 9.770187e-05
## 21 26-3 0.4374614 6.353902e-05
## 22 dlw13a 0.4379234 3.495205e-13
## 23 058021 0.4395980 0.000000e+00
## 24 dlw11c 0.4412800 0.000000e+00
## 25 DLA130 0.4514978 1.002231e-11
## 26 DLA015 0.4529062 0.000000e+00
## 27 DLA041 0.4587786 0.000000e+00
## 28 DLA067 0.4713568 1.896147e-09
## 29 058152 0.4730440 9.139860e-18
## 30 dlw08a 0.4788281 0.000000e+00
## 31 dlw27a 0.4792008 0.000000e+00
## 32 dlw11a 0.4800313 0.000000e+00
## 33 DLW20A 0.4838462 0.000000e+00
## 34 DLA123 0.4841609 2.043172e-12
## 35 dlw07a 0.4853488 7.707901e-08
## 36 058022 0.4880301 0.000000e+00
## 37 dlw05a 0.4990640 0.000000e+00
## 38 DLA051 0.4998622 1.567310e-08
## 39 dlw26b 0.5019498 0.000000e+00
## 40 dlw23b 0.5026996 0.000000e+00
## 41 dlw27b 0.5038942 0.000000e+00
## 42 058141 0.5044776 0.000000e+00
## 43 058071 0.5055818 0.000000e+00
## 44 DLA087 0.5061015 7.408914e-09
## 45 dlw06a 0.5083696 0.000000e+00
## 46 058151 0.5096539 0.000000e+00
## 47 8-1 0.5098039 1.932078e-02
## 48 DLA126 0.5107752 0.000000e+00
## 49 DLA097 0.5127873 0.000000e+00
## 50 dlw20b 0.5189875 0.000000e+00
## 51 dlw08b 0.5210804 0.000000e+00
## 52 058121 0.5253849 0.000000e+00
## 53 058202 0.5272316 0.000000e+00
## 54 058142 0.5326683 0.000000e+00
## 55 058102 0.5344544 8.544697e-22
## 56 058191 0.5359554 0.000000e+00
## 57 dlw25b 0.5385741 0.000000e+00
## 58 DLA052 0.5455557 0.000000e+00
## 59 12-4 0.5497186 1.495766e-04
## 60 058061 0.5546450 0.000000e+00
## 61 058051 0.5577048 0.000000e+00
## 62 058062 0.5794697 6.663897e-27
## 63 058082 0.5818860 0.000000e+00
## 64 058101 0.5840903 0.000000e+00
## 65 058032 0.5910455 0.000000e+00
## 66 058031 0.6077885 0.000000e+00
## 67 058081 0.6108825 0.000000e+00
## 68 058052 0.6133857 0.000000e+00
## 69 058072 0.6247410 6.601451e-32
## 70 058201 0.7086074 0.000000e+00corr.master <- corr.rwl.seg(master.rwl, xlim=c(1600,2010))
flags <- as.data.frame(corr.master$flags)
flags## corr.master$flags
## 058121 1925.1974
## 058122 1925.1974
## 058141 1925.1974
## 058202 1925.1974
## 058211 1775.1824, 1900.1949, 1925.1974
## dlw11c 1875.1924
## DLA015 1725.1774
## DLA126 1700.1749
## DLA130 1750.1799
## 13-3 1950.1999
## 33-1 1925.1974Here I’m remove any samples that both have a flag/correlate poorly while ensuring proportional sample sizes.
The mi015 samples have the lowest correlations, but they are the most recent and still are adequete so I’m not removing many of them.
Remove from RWL file
#Remove low flags/correlations
master.rwl <- master.rwl %>% select(-"058211", -"33-1", -"058122", -"13-3", -dlw11c, -DLA130, -"058121", -"058122", -"058141", -DLA015, -DLA126, -DLA130)
#Re-compute correlations
master.cor <- interseries.cor(master.rwl)## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with tiesmaster.cor <- tibble::rownames_to_column(master.cor, "sample") #add years from row names3.5.2 Second Iteration
Locations of Samples:
- pa008: 20 series (33%); format 058xxx
- cana127: 14 series (23%); format dlw 00x
- cana148: 7 series (12%); format DLA 00x
- mi015: 19 series (31%); format 00-0
corr.master <- corr.rwl.seg(master.rwl, xlim=c(1600,2010))
flags <- as.data.frame(corr.master$flags)
flags## corr.master$flags
## 058202 1925.1974
## DLA067 1700.1749
## DLA041 1700.1749, 1725.1774The two samples from cana148 flagging are older and can be removed
#Remove flags/low correlations
master.rwl <- master.rwl %>% select(-"058202", -DLA067, -DLA041)
#Re-compute correlations
master.cor <- interseries.cor(master.rwl)## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with ties
## Warning in cor.test.default(series[, i], master[, i], method = method2, :
## Cannot compute exact p-value with tiesmaster.cor <- tibble::rownames_to_column(master.cor, "sample") #add years from row names3.6 Summary of Master Chronology
Series summary:
- pa008: 19 series (33%); format 058xxx
- cana127: 14 series (24%); format dlw 00x
- cana148: 5 series (9%); format DLA 00x
- mi015: 19 series (33%); format 00-0
rwl.report(master.rwl)## Number of dated series: 57
## Number of measurements: 10137
## Avg series length: 177.8421
## Range: 324
## Span: 1679 - 2002
## Mean (Std dev) series intercorrelation: 0.4719945 (0.09495867)
## Mean (Std dev) AR1: 0.7817895 (0.1135489)
## -------------
## Years with absent rings listed by series
## Series 058061 -- 1934
## Series 19-3 -- 2002
## 2 absent rings (0.02%)
## -------------
## Years with internal NA values listed by series
## NoneAs compared to the initial report:
- Number of dated series: 142
- Number of measurements: 27695
- Avg series length: 195.0352
- Range: 1053
- Span: 950 - 2002
- Mean (Std dev) series intercorrelation: 0.4408118 (0.1237108)
- Mean (Std dev) AR1: 0.8146479 (0.1121976)
seg.plot(master.rwl, xlim=c(1675,2010))
corr.master <- corr.rwl.seg(master.rwl, xlim=c(1675,2005))
avg.seg.rho <- as.data.frame(corr.master$avg.seg.rho)
tail(avg.seg.rho)## corr.master$avg.seg.rho
## 1825.1874 0.6061646
## 1850.1899 0.5187919
## 1875.1924 0.4866719
## 1900.1949 0.4784519
## 1925.1974 0.3938473
## 1950.1999 0.43447863.6.1 Write RWL to file
write.rwl(master.rwl, "outputs/master.rwl", format = "tucson")## Warning in fix.names(col.names, name.width, mapping.fname, mapping.append):
## characters outside a-z, A-Z, 0-9 present: renaming series## [1] "outputs/master.rwl"3.7 Detrend
Probably the most common method for detrending is what is often called the “conservative” approach of attempting to fit a negative exponential curve to a series. In the dplR implementation the “ModNegExp” method of detrend attempts to fit a classic nonlinear model of biological growth of the form f(t) = a exp(bt) + k, where the argument of the function is time, using nls.
master.rwi <- detrend(rwl = master.rwl, method = "ModNegExp")3.7.1 Compute Statistics
Can also be done with a moving window
rwi.stats(master.rwi)## n.cores n.trees n n.tot n.wt n.bt rbar.tot rbar.wt rbar.bt c.eff
## 1 57 57 9.627 1236 0 1236 0.134 NA 0.134 1
## rbar.eff eps snr
## 1 0.134 0.599 1.4913.7.2 Build Chronology
master.crn <- chron(master.rwi)
plot(master.crn, add.spline=TRUE, nyrs=30, xlim=c(1600,2010))
3.7.3 Add Uncertainty Estimates
master.avg <- apply(master.rwi,1,mean,na.rm=TRUE)
yrs <- time(master.crn)
se <- function(x){
x2 <- na.omit(x)
n <- length(x2)
sd(x2)/sqrt(n)}
master.se <- apply(master.rwi,1,se)
master.sd <- apply(master.rwi,1,sd,na.rm=TRUE)
par(mar = c(2, 2, 2, 2), mgp = c(1.1, 0.1, 0), tcl = 0.25, xaxs='i')
plot(yrs, master.avg, type = "n", xlab = "Year", ylab = "RWI", axes=FALSE, xlim=c(1675,2010))
xx <- c(yrs,rev(yrs))
yy <- c(master.avg+master.se*2,rev(master.avg-master.se*2))
polygon(xx,yy,col="grey80",border = NA)
lines(yrs, master.avg, col = "black")
lines(yrs, ffcsaps(master.avg, nyrs = 30), col = "red", lwd = 2)
axis(1); axis(2); axis(3); axis(4)
box()
4 Conclude Session
sessionInfo()## R version 3.6.2 (2019-12-12)
## Platform: x86_64-apple-darwin15.6.0 (64-bit)
## Running under: macOS Catalina 10.15.3
##
## Matrix products: default
## BLAS: /Library/Frameworks/R.framework/Versions/3.6/Resources/lib/libRblas.0.dylib
## LAPACK: /Library/Frameworks/R.framework/Versions/3.6/Resources/lib/libRlapack.dylib
##
## locale:
## [1] en_CA.UTF-8/en_CA.UTF-8/en_CA.UTF-8/C/en_CA.UTF-8/en_CA.UTF-8
##
## attached base packages:
## [1] stats graphics grDevices utils datasets methods base
##
## other attached packages:
## [1] stringr_1.4.0 corrplot_0.84 ggplot2_3.2.1 dplyr_0.8.3 tidyr_1.0.2
## [6] dplR_1.6.9
##
## loaded via a namespace (and not attached):
## [1] Rcpp_1.0.3 compiler_3.6.2 pillar_1.4.3
## [4] plyr_1.8.5 iterators_1.0.12 R.methodsS3_1.7.1
## [7] R.utils_2.9.2 tools_3.6.2 digest_0.6.23
## [10] gtable_0.3.0 evaluate_0.14 tibble_2.1.3
## [13] lifecycle_0.1.0 lattice_0.20-38 pkgconfig_2.0.3
## [16] png_0.1-7 rlang_0.4.3 foreach_1.4.7
## [19] Matrix_1.2-18 yaml_2.2.0 xfun_0.7
## [22] withr_2.1.2 knitr_1.23 vctrs_0.2.2
## [25] grid_3.6.2 tidyselect_1.0.0 glue_1.3.1
## [28] R6_2.4.1 XML_3.98-1.20 rmarkdown_1.13
## [31] animation_2.6 purrr_0.3.3 magrittr_1.5
## [34] codetools_0.2-16 scales_1.1.0 matrixStats_0.54.0
## [37] htmltools_0.4.0 MASS_7.3-51.4 assertthat_0.2.1
## [40] colorspace_1.4-1 stringi_1.4.5 lazyeval_0.2.2
## [43] munsell_0.5.0 signal_0.7-6 crayon_1.3.4
## [46] R.oo_1.23.0